Six was born and raised in Riverside, California. Six started modeling at the age of two and tried for a mainstream modeling career, which did not materialize because she did not reach the minimum height to be considered. Six planned to become a pediatric nurse prior to her adult film career. She attended dental assisting school and nursing school until December 2011. She is also a former gymnast and cheerleader. Rikki originally wore a 34A bra, but after breast augmentation surgery with 545cc saline implants she now wears a 34DD bra.